Posted 20 hours ago

Fernox 56608 1L F5 Powerflushing Cleaner

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It is non-aggressive and not acidic like some of the faster cleansers. If you forget to drain it out, it doesn't do any harm (but it will lose its power and the dirt will re-settle after about 4 weeks). The fill and dump rate may need to be rebalanced when the flow is reversed due to differences in system resistance in each direction of flow. For all systems, isolate and clean the upstairs radiators first as downstairs radiators tend to be more affected by sludge and scale. What you have done is the absolute classic of adding a cleanser into a system and leaving it in too long.

Which cleaner is easiest and safest to use that i can just run, drain and then refill. oh and which inhibitor should I use?With the system filled and the powerflush unit running, circulate and reverse the flow direction every one to two minutes. An additional or repeat dose of Cleaner F3 may be necessary in some cases. Drain and flush thoroughly, at least twice, until the water runs clear. When using Cleaner F3 with a powerflushing machine, cleaning should be completed within an hour. Use dynamic flushing with plain water until the water is clear. Refill the system adding Fernox Protector F1 for long term protection against corrosion and limescale. In single feed indirect cylinders, e.g.’Primatic’or similar, potable water chemicals must be used.

I've only got a few days to run the system with cleanser in (X400 or whichever) because I'm having a new boiler fitted on 4th September. The X400 (or whichever) won't arrive til Tuesday 29th, hence the plan to run the old boiler for 6 one-hour bursts.Btw, I've also put a brand new F&E tank in the loft - so that's one part of the system that doesn't need anything doing to it A single dose of Cleaner F3 treats a larger sized property with a heating system of 130 litres, up to 16 radiators, or 250 sqm of underfloor heating. Additional/repeat applications of Cleaner F3 may be necessary for larger systems, or if systems are heavily sludged. Alternatively, Power Cleaner F8 may be used for heavily sludged systems.

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